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The Road to Tin Whisker Detection

The Road to Tin Whisker Detection. Michael Weber SAIC Intern Purdue Technology Center August 10, 2010. Previous Equipment. Fisher Scientific Micromaster Microscope Canon G10 Camera USB Digital Microscope Fiber-Optic Light Source 360 Ring lamp Bifurcated light guide

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The Road to Tin Whisker Detection

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  1. The Road to Tin Whisker Detection Michael Weber SAIC Intern Purdue Technology Center August 10, 2010

  2. Previous Equipment • Fisher Scientific Micromaster Microscope • Canon G10 Camera • USB Digital Microscope • Fiber-Optic Light Source • 360 Ring lamp • Bifurcated light guide • 7 In. Tile Wet Saw • Hand Dremel tool

  3. New Equipment, cont’d • Fisher XDAL X-ray Fluorescence Spectrometer • Perform elemental analysis of samples; returns weight percent of elements • Design programs to calculate thickness of layers • Automated arrays of inspection points • Generate tabular and graphical results

  4. New Equipment, cont’d

  5. New Equipment • Nibbler • Designed for soft sheet metal • Cuts boards well but poor maneuverability

  6. New Equipment, cont’d • Diamond Tech DL3000 XL Band Saw • Variable speed, diamond-tipped blade • Integrated water pump with filters

  7. New Equipment, cont’d • Hitachi TM-1000 Tabletop SEM • 20x – 10,000x magnification; 15 kV voltage • 70 mm maximum specimen size • Integrated software for all image manipulation, capture, editing • Acrylic enclosure with filter-fed air for clean environment

  8. New Equipment, cont’d

  9. New Equipment, cont’d

  10. Conclusions • Well-documented data base of inventory; backlog of parts still needed to be examined • Instruments with sufficient capabilities for elemental analysis, cutting, and inspection • Developed routine for inspection (Logging, XRF, component extraction, SEM)

  11. Path Forward • Continue to search for parts; need a more reliable Pb-free source • Refine methods; namely a method to clean debris from boards without removing whiskers • Continue examination with possible acceleration of commercial whiskers

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